What does the Bible say about pure worship?

In Malachi 1:11, the Lord declares that from the rising of the sun to its setting, His name shall be great among the Gentiles, and incense shall be offered to Him, along with a pure offering. This underscores the importance of true worship, which should not be merely physical or formal but should come from a place of sincerity and truth. The Lord seeks worshipers who approach Him with a pure heart, as emphasized by the necessity of spiritual worship in John 4:23. This highlights that our approach to God should be earnest and reflective of His holiness, rather than simply a matter of ritual or tradition.